Reaming tool for connecting rods



June 17, 1930. W. AAB 1,763,917

REAMING TOOL FOR CONNECTING RODS Filed Sept. 25, 1926 Patented June 17,1930 f Y stares .err assist WILLIAIVI AAB, OF NEW ULM, MINNESOTA REAMINGTOOL FOR CONNECTING RODS Application led September 23, 1926. Serial No.137,329.

This invention relatesto a tool con-struct- Fig. 2 is a vertical sectiontaken on the ed and arranged to facilitate the reaming line 2-2 of Fig,l, as indicated by the aroperations in the bores of connecting rod rows;bushings, or similar articles. Such connect- Fig. 3 is a Verticalsection taken en the 5 ing rods are now used in large numbers in line3--3 of Fig. 2, as indicated by the arautomobiles. It is frequentlynecessary to rows; l renew the bushing in the connecting rods Fig. 4 isa vertical section taken on the which embraces the wrist pin and reamthe line lf-4 of Fig. 2, as indicated by the arsame. Diliculty has beenexperienced in rows;

l0 properly finishing the bore of the bushing Fig. 5 is a plan detailview of ene of the 160 especially by inexperienced. workmen, and partsused; the bore is frequently made larger at its Fig. 6 is a plan detailview of another ends, owing to the fact that the reamer is of the partsof the device; and tilted and is not passed through the bore Fig. 7 isapartial View similar to Fig. 3,

15 co-aXially therewith. showing the parts in locating position. .65

It is an object of this invention, therefore, Referring to the drawings,a connecting to provide means constructed and arranged rod 10 is shownin Fig. 1, such as now com to properly guide the reanier and center themonly used on automobile or internal comsame while the bore of thebushing in the bustion engines. In Fig. 3 the connecting 20 connectingrod is being finished. rod 10 is shown as clamped between the jaws 70 Itis a further object of the invention 11 and 12 of a vise, the connectingrod being to provide means for centering and guiding so held when thereaming operation is perthe reamer comprising a member adapted formed.The connecting rod 10 has a hub to engage and be clamped to theconnecting 10a at one end which is bored and reamed rod having anothermember attached thereto embrace the usual pistonI pin in the pis- 75 teand relatively movable thereto carrying ton of the engine cylinder.V

a centering means for the reainer, which In accordance with the presentinvention, latter member is adapted to be properly ada tool is providedcomprising a member 15 justed and held in adjusted centeringposipreferably formed as a casting, which mem- 30 tion. ber has spacedjaw portions 15a at one end, 8o

It is still another object of the invention each of which has one fiatjaw surface 15b to provide a member engaging and clampdisposedsubstantially at right angles to the ing the connecting rod includingclamping longitudinal axis of the-member 15 and'havjaws and having aflat surface at one end ing another jaw surface 15c disposed at anengaged by a fiat plate which is longitudiacute angle to the surface15b. The mem- 85 nally and laterally movable on said member ber 15 has,at its end opposite the jaw 15, and adapted to receive a centering meansfor a fiat surface 15d formed on a pair of lugs the reamer, togetherwith; means for hold- 15e. The central'portion of the member 15 ing saidplate in properly adjusted position. is formed as a web having thickenedpor- These and other objects and advantages tions 15f at the sidesthereof, as clearly J0 of the invention will be fully set forth in shownin Fig. 3. The member 15 also has the following description made inconnecprojecting from one .side thereof, spaced tion with theaccompanying drawings in lugs 15g between which lugs is pivoted a whichlike characters refer to the different member 16 by means of the pivot1.6c shown parts throughout the different views, and as riveted inplace. The member 16 is formed 95 in which, as a jaw at its outer end,which end alrnes Fig. 1 is a plan view of the device showlaterally withthe jaw portions 15a, which jaw ing a connecting rod and reamer inconnec-v has a surface 16a which, when in clamping tion therewith,together with a vise in which position, extends at an angle slightlyless o the connecting rod is held; than a right angle to the surface15", as [..31'1

shown in Fig. 2. The member 16 has pivoted thereto, intermediate itsends, a small U-shaped yoke member 17 having secured in the bightportion thereof, one end of a screw 18, which jaw extends toward themember 15 and extends through an aperture 15h in the web of member 15.The free end of the jaw is engaged in a threaded bore in the end of aclamping member 19 illustrated as a cylindrical rod having a handle rod19a extending at right angles therethrough adjacent its outer end. Aplate 20 is provided illustrated as having flat surfaces and being ofsubstantially uniform thickness, which plate 'has a slot 2()a extendinglongitudinally from one end :and :terminating in :a circular enlargement20D. Saidplate has an offset circular portion 4at. one vend having acircular aperture 2OC lex- -tending therethrough. A pair Vof headedscrews 21 extend through the plate 20 and the slot 20a and are threadedinto the lugs 1.58, washers 22 .being disposed beneath the heads ofscrews 21. A compression spring 23 is disposed lbetween the members 15and 16 between lugs 15g and yoke 17,'th1eends ofwhich embrace smallpinsy or `projections 16b and 15i, respectively., which project frommembers 15 and 16, respectively, :these pins or projectionsacting tohold said sprin in place. A centering member or cone 211 is providedwhich, as shown :in Figs. 3 and 7, comprises a -member having oppositelytending frusto-conical end portions having therebetween, a cylindricalportion 211a of enlarged diameter' having its periphery knnrled. rThemember 211 is divided .along a fdiametral iplane `and hinged :atonef'side softhat it may be readily opened and closed. An adjustablereamerr25 .is shown, 7and while any adjustable reamer may :be used, inthe embodiment of Ithe invention illustrated, a

Yreainer .is `shown having a threaded cylindrical lend 'portion251 andan intermediate portion having longitudinally extending grooves T25btherein. The grooves 251D are adapted to receive reamer blades 25C :andthese blades may be moved longitudinally` to increase or decrease `thediameter of circle engaging their outer surfaces by being movedlongitudinally in fthegrooyes 25b by the collars 25d `which receive the`ends vof said 'blades and are moved'longitudinally by the rnuts 25e.The :bottoms of the grooves 25b are Yinclined Lto the `axis of vthereainer so fthat the sblades'are cainmed outwardly by said grooves, 'itbeing understood that the reainer 'is'also threaded throughout the poi'-tion occupied 'by the grooves .2511.

When `the bore of fthe connecting rod hub is ito 'be resumed, `theconnecting rod will be placed 'in Vand clamped in some holding means,:such as the jaws l'l'and 12 of a vise, as illustrated. The tool of thekpresent invention will then be engaged with and clamped on theconnecting rod, as shown in Figs. 1 and 2. It will be seen that, owingto this position of the jaw surfaces 15 and 16, the connecting rod 10will be clamped surface 15b. The connecting rod is thus held with theaxis of the hub 10'JL and the bore therein substantially parallel withthe longitudinal central axis of the member 15; The reamer .25 is nowplaced in position, as shown in Fig. 7, with the blades 25csubstantially longitudinally centered .in the -hub 10, said blades beingadjusted so that the reanier fits snugly in the ibore of h-iib 10a.

he reamer, at lthis time, extends through the aperture 20c Ain .plate20. The centering cone or shell 211 is now closed about .threaded vendof the reamer25 at .theloiIt-'er side of the platey 20and is thenscrewed on the reamer toward .the hub 1.0%. 'The icone new centers thelaperture 2@c :sort-hat `its 4fcenter is coaxiaL with the reamer. lVhenthe plate Y2O is rthus accurately icentered with fthe reainer, thescrews 21 Aare'tightened.to 'hold the plate firmly in kposi-tion 'onmember 15. will be seen that the plate 26 more longitudinally on member15 Vand 'can :allso beswiing laterally :about the screws 2.1 nearest theend of `the plate, tlieajierturel20" .permitting this lateral swingingmoy-ement. VJ hen the plate is thuslcentered the irerainer is withdrawnfrom vthe fboreiof v'liiiib 16a :and the `reamer is then adjusted itethe .proper size for reaming out-said bore. Tfhezreanier is theninserted Afinto the bore, fassliowii in Fig. V1, lthe threaded end4engaging yin the cone 2.11. The Ireanier Yis now turned,as usual, andis' drawn or yfed th-rough `the bore iin the hub 10EL bythe threadsathereonlengagi'ng tlie threaded kinterior Jof `thecone c The reamer isthus guided in perfect and accurate alineinent with its axisxco-axial'withzthe vaxis of the bore and of the 'centering cone211 so that thereis no ychance =for 4the freamer :to tilt or move inte position :with itslaxis inclined to the axis of 'the A perfect cylindrical bore is thu-smade in the hub 16.

When the vtool 'is to .be Areleased from the aio connecting rod thehandle 2O and member 19 Y tween the end of the hub-a cftheiconnectingrod and the plate, thusrallowiiig Yplenty of room for the reamer to movethrough the bushing or hub l()a without engaging said plate or thecentering cone 24. This greater distance is obtained by reversing saidplate.

From the above description it is seen that applicant has provided a verysimple, convenient and highly efficient device for use in reaming outthe bushings in connecting rod hubs. The tool is simple in constructionand easily and quickly positioned. The connecting rods can thus bereamed by Workmen who are not experienced machinists and al perfect jobwill be done. The device has been amply demonstrated in actual practiceand found to be very successful and efficient.

It will, of course, be understood that various changes may be made inthe form, de-

tails, arrangement and proportions of the parts without departing fromthe scope of applicants invention which, generally stated, consists ofthe parts and combinations of parts disclosed and defined in theappended claims.

What is claimed is:

l. A device for use in reaming the bores of bushings in connecting rodsor similar devices having in combination, means for engaging andclamping a connecting rod comprising a member having a jaw at one endwith one surface extending substantially normal to the longitudinal axisof said member and another surface inclined at an acute angle to saidsurface, a member pivoted to said member having a jaw at one end with asurface making an angle of slightly less than ninety degrees with saidrst mentioned surface, means for moving said jaws to clamp a connectingrod therebetween, said member having a flat surface at its end oppositesaid jaw, spaced headed screws threaded into said member, a plateengaging said flat surface disposed under the heads of said screws andhaving a slot therein embracing said screws with an enlargement at oneend about one of said screws, said plate having an opening therein atone side of said member, and a centering means positioned in saidopening adapted to receive a reamer to position said plate with saidopening co-axially alined with the bore of said bushing, said centeringmeans being adapted to guide and feed said reamer.

2. The structure 'set forth in claim 1, means for moving said first twomembers together to clamp said connecting rod, and a spring for movingsaid members apart.

3. A device for reaming the bushings of connecting rods or similardevices having in combination, a member having an angular jaw at oneend, a jaw pivoted to said member and cooperating with said angular jawto v clamp the shank of a connecting rod, said member having a flatsurface at its opposite end, a plate movable over said surface, meansfor clamping said plate in xed position on connecting rods or similardevices having in combination, a member having a fixedV jaw at one end,a jaw member pivoted to said member and adapted to cooperate therewithto clamp the shank of a connecting rod, one of said jawsfhaving a flatsurface against which the wide side ofthe connectingprod shank engages,said member having lugs at its opposite end having fiat surfaces, screwsthreaded into said lugs, a plate clamped against said surfaces by saidscrews and having a slot embracing said screws whereby said plate islongitudinally and laterally movable on said fiat surfaces said platehaving an aperture in one end, a centering member receivable in saidaperture and being internally threaded to engage the threaded shank ofaI reamer whereby said plate can have the aperture therein axiallylaligned with the aperture in the bore of said connecting rod by looselyinserting the reamer in said bore and having it engaged by saidcentering means, saidA centering means acting to propel said reamer uponrotation of the latter. n

5. A device for reaming the bushings of connecting rods or similardevices having in combination, a member having a fixed jaw at one end,said jaw having one surface at right angles to its longitudinal axis andhaving another surface extending at an acute angle thereto, a movablejaw member pivoted to said member and adapted to cooperate with saidjaws to clamp the shank of a con necting rod, means for moving saidmovable jaw member toward said member, said member having at itsopposite end a iiat surface parallel to the first mentioned surface ofsaid fixed jaw, a plate slidable over said flat surface, means forclamping said plate in fixed position on said surface, said plate havingan aperture therethrough, a centering means receivable in said apertureautomatically centerable therein and internally threaded to receive thethreaded shank of a reamer which may extend through the bore of saidconnecting rod, the aperture in said lplate thus being axially alignedwith said ore.

6. A device for reaming the bushings of connecting rods or similardevices having in combination, a member having a fixed jaw at one end, asecond jaw pivotally connected to said member, one of said jaws havingsurfaces making an acute angle with each other, means for moving saidjaws tdgether to clamp the shank of a connecting rod therebetween, saidmember havinga surface yat its opposite end, a member `'movablek inengagement with said surface -longitudinally and laterally of Lsaid=connecting rod, said member having an aperture therein yadaptedto belaxially aligned with the ybore of said yconnecting rod, a centeringmember 4received in said aperture andi automatically 'center abletherein, said centering member being internally-.threaded vtoreoeive thethreaded shank of a reamer inserted in said bore-whereby saidreamerimay'be movedthrough saidbore on rotation'thereot 7. A device-orreaming-a bushing in` the end -of 'a connecting rod of ,fanautomobile engine having -vin combination, Va member having at lone fendVjaws adapted to be clamped to the connecting yrod shank adja- .cent theend ,having the -bore to be reamed, armember at `the other end off saidrst mentioned member movable longitudinally 'and laterally :orf theconnecting irod, said Alast mentioned Y member having yan 4aperturethrough -one end, a member internally threaded to vembrace the threadedshank of a reamer and receivable and automatically centerable Y-insaidaperture and adapted 'to receiveand embraee the threaded shank ofsaid reamer When the same is disposed vin the bore of said connectingrod and centered therein, said centering means thus acting vto align.said aperture axially with said bore. In testimony whereof I aHiX mysignature.

' WILLIAM AAB.

